<< The clips holding it in are the dark grey ones and I do not have any
to spare if broken while removing. What is the best way to pop them out?
� Will a trim tool help? TIA, >>

This is where "the right tool for the right job" kicks in.

A panel clip remover tool works well, and will do the least damage.

However, being that the panel clips are old and dry, plan on snapping a
few regardless what you use to remove them.

Bob Villa